دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a bit that, when rotated, drills a hole larger than its diameter.

valve designed for blocking the fluid in upstream and downstream directions.

a type of corrosion found when dissimilar metals are joined. One part becomes the cathode and the other the anode where accelerated corrosion may be seen.

n: see directional drilling.

a weld technique on diagonal cut strips of steel, superior to the butt weld process for joining flat strips of metal together before rolling into coiled tubing.

bicarbonate of soda, used in acid neutralization operations.

a compound containing the HCOO- ion.

a perforating charge with the liner shaped to create a large entrance hole but a shallow penetration. See Deep Penetrating Charge.

n: the first cross-country pipeline with a 24-inch (61-centimetre) diameter. The 1,340-mile (2,157 -kilometre) Big Inch was begun in 1942 with government financing as a part of an emergency construction program (War Emergency Pipelines) to meet the demand for petroleum products during World War II.